Machine for laminating paper



Sept 9, l'941- M. HL slDEBo'rHM 2,255,397

MACHINE FOR LAMINATINGVPAPER Filed oct. 5, 1938 2 sheets-sheet 1 M. H. SIDEBOTHAM MACHINE FOR LAMINATING PAPER sept. 9, A1941.

Filed Oct. 5, 1938 2 Sheets-SrheetZ l Patented Sept. 9, 1 941l UNITED STATE s, PATENT OFFICE MACHINE Fon. LAMINATING PAPER Melvin 1H. Sidebotham, West Newton, Mass., as-

signor of one-half to Harlow M. Russell.

Chelsea, Mall.

Application October 5, 1938, Serial No. 233,431

Claims.

This invention relates to the production of laminated sheet material .which is moistureproof, water-proof and grease-proof. Such material is very desirable for use in thel packaging of foods such as bakery products, dairy products, and for use wherever a package is required to have the quality of resisting the action of moisture and grease, whether inside or outside of the package.

One object of this invention is to provide a machine by which a. thin sheet of paper may be bound to a sheet of paper board by means of a v layer of wax. 4 Another object of my invention is to provide a machine Awhich will automatically supply wax of a predetermined consistency between'the layers of paper to be laminated.

Another object of my invention is to provide a machine to efiect'rapidproduction of laminated paper by a sequence of operations, comprising means to cause two webs of paper to travel and means for applying a binding material between the two traveling webs, means for pressing the united web, and means for cutting the laminated' It will be readily understood, without need of illustration, that any suitable motor may be employed for operatingthe machine, an'd that suitable gearing is employedinpractice to cause the I0 is journaled inside frames I and 2.lA Operating rolls I I `and I2 are securedtoshalfts I3 and I4 whichare journaled in sid'e frames I andl 2.

A guide roll. I5 secured to shaft I6 mounted on side frames I and 2 is provided beneath the op'- erating rolls. Pressing rolls I1 and I8 mounted on shafts I S and 20 journaledin' side frames I and 2 serve to press the laminated web. .The cutting bed plate 2| is supported by side frames I and 2. The cutting roll 22, having secured thereto a cutting knife '23, is mounted onl shaft 24 journaled in side frames I and 2. belt 24 is supported by rolls 25 land 26 journaled in= side frames I and 2. A delivery board 24 is provided to receive the cut laminated sheets.

Referring to Figures l and 3 wherein is shown the wax preparing unit composed of a Wax heating tank 28 having two compartments 29 and 30 formed by partition 3I which is providedwith secured to side frames I and 2 by means of lugs 34 (Fig. l). The tank 28 is also provided with two pipe support members 35y and 36 (Figs. 3 and 4) which support heater pipe 31. The wax feeding cylinder 38 is supported by tubular'shafts 39 and 40. 'Water cooling pipes 4I. and 42 are K connected to the ends of shafts 39 and 4Il. A

w-ax scraping plate 43` having lugs 44 is secured an enlarged section at' 4-4 `of Figvarious rolls and's'hafts to rotate at uniform peripheral speedto effect travel of the webs of paper through the machine and to operate the various devices .which act upon the paper to produce laminated sheets in the manner described. Referringl to Figures 1 and 2, the different parts of members of the machine are mounted on suitable side frames I and 2 connected by cross bars 3 and 4 which constitute the framework of vthe machine. Paper roll l is secured to shaft 1 which is rotatably mounted on side frames I and 2. 'I'he guide roll l is mounted on shaft 9 which is vJournaled in side frames I and 2. Lead roll 55 to to side frames I and 2 by means of bolts 45. A pair of wax guides 48 having lugs 41 is secured to side frames I and 2 by means of bolts 48.

While the machine herein described and claimed includes the combined instrumentalities herein mentioned, Iglwlsh itto be understood that I .consider the herein described means not only combinatively novel, but insofar as I amaware, certain of the devices going to make upv such means are new in less combinations than' the whole and some capable of individual use, as will more clearly appear hereinafter.

operation of the machineand of the methodof laminating the paper, to explain the action of the `machine which effects the production of laminated sheets from two or more rolls of paper. Re-

ferring toFlgures 3 and 4 wherein is shown av wax preparing unit. The wax herein used is at J@ual atmospheric temperatures. solid andv rather rm,but upon the application of heat the wax melts and becomes liquid. The pipe 31 is provided to apply heat to the bottom of tank 28 for the purpose of melting the wax. The wax being placed in compartment 29 for melting. The

openings 32 and '33 in partition 3| are provided allow the liquid wax to circulate from compartbelivery two openings 32 and 33. The said tank-28 being It 'will aldltoward an understanding of the4 ment 29 through compartment 30. The wax feeding cylinder 38 is so positioned that a portion of the outer diameter will always be 'submerged in the liquid wax in compartment 30 of the tank l. 28. `This cylinder is provided with means for Y cooling the outer surface of the cylinder so that the outer surface thereof will be at a temperature lower than that .of the liquid wax in the tank. The cooled cylinder 38 Ain rotating through the liquid wax Will'have formedon the outer surface thereof a coating of pliable semi-congealed wax.

and also becomes united with the paper web sup.

plied from roll 6. The united web then'` passes under roll I5 to pressing rolls IT and I8 where 'the laminated web is securely pressed. l*The web then passes to the cutting unit which severs the web into predetermined lengths and supplies the `cut sheets to the delivery board 21 ready to beV picked up for use.

The methods heretofore employed for securing a thin paper material to' paper board, resulted in a discoloredunsightly product, due to the hot wax penetrating 'the thin paper material.

ApplicantA has obtained new and improved resuits by rst melting the wax to liquid condition, and thencooling the wax until it is of a semiplastic consistency.

Having now described my invention, what I claim is:

1. In a paper laminating machine, comprising A a wax heating unit, a wax feeding cylinder positioned to rotate in liquid wax, means to cool the wax picked up by the Wax feeding cylinder, and a stationary scraping plate positioned to `scrape the cooled wax from the rotating wax feeding cylinder and depositing the wax between two webs of paper.

2. In a machine for laminating paper,.com prising means to heat wax to a liquid condition, a wax feeding cylinder positioned torotate in the liquid wax, means to cool the wax deposited on the cylinder to a semi-plastic condition, a scraping plate adjacent to the cylinder for scraping the semi-plastic Wax from the cylinder and depositing the wax between two sheets of paper, and rolls for pressing the sheets of paper together. s

3. In a machine for laminating paper, comprisf ing a wax heating tank, a wax feeding cylinder positioned to rotate in liquidflwax, means to chill the wax 'picked up by the cylinder, means to remove' thev chilled waxfrom the lcylinder, and thereafter deposit the wax between two layers of paper.v

4. Inl a machine for laminating paper, comprising a wax heating tank, a wax feeding cylinder positioned to,v rotate in liquid wax, means for,

for cooling the wax applied to the cylinder, and` a scraper plate for removing the wax from the cylinder and for depositing the wax between two sheets 'of paper.

NIELV'IN H. SIDEBOTHAM.. 

